mass transfer in multiphase systems - Greenleaf University

MASS TRANSFER IN MULTIPHASE SYSTEMS: VOLATILE ORGANIC COMPOUND
REMOVAL IN THREE-PHASE SYSTEMS
2 Determine the slip velocity l based on approximate curve fit from (Treybal 1987).
3 Determine the gas holdup.
4 Determine the orifice Reynolds number.
5 Determine the bubble diameter based on Re o .
6 Determine gas Re based on slip velocity, bubble diameter, and liquid properties.
7 Ignoring the “a” in Eq. 28, the Sherwood number ratios were used to get the scaled up mass
transfer coefficient:
K
K
Re
d
G2 B2
L2
L1
ReG1 dB
1
c
j1
(40)
8 Determine the bubble specific surface area:
a
B
6
(41)
d
B
9 Eq. 29 and 30 are combined to provide K ’ o in Eq. 27.
4.2 Design Based On Theory Alone
The theory developed in Section 3 was used for the operations used in several
configurations including demonstrating the Volatility in the cone bottomed tank (TK-V9) shown
in Figure 8. Similar analysis was performed for all of the V-Tanks. The V-Tanks were 20 ft high
tanks had a ring-bubbler agitator system installed in recommended positions (Treybal 1987).
l This is difficult to envision when it’s not counter-current flow.
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